The collapse tension and fracture stress for shale–sandstone have been computed across various elastic modulus and Poisson’s ratios to ascertain the Safe and sound density window. The PPW criterion improved reveals the energy of shale with varying bedding angles. On this analyze, the JPW and PPW requirements are used https://vertechs1.blogspot.com/2025/10/advancing-well-control-how-vertechs-is.html